Home button
When I click my home button it doesn't work.
iPhone 6s, iOS 15
Question marked as
Top-ranking reply
First try a Forced restart which may not work if your phone model requires home button to do it.
Force restart iPhone – Apple Support (UK)
If no better you should arrange a repair iPhone Repair - Official Apple Support
or Contact - Official Apple Support
Anything other than Screen or Battery may be a replacement phone and the price is in the article under "Other damage"
See also: Get your iPhone, iPad, or iPod touch ready for service - Apple Support